ToS does not ban people from using your computer or their computer at your residence on your connection, and you are not responsible for their actions in these instances. Nor are you required to log who is at your house or if they have access to a wifi device while there. And this is the simplest of possible scenarios that fall outside the scope of Tos that reflect on your use out of care and custody, but on your wifi legitimately.

Basically, broadband is so ubiquitous, it is not reasonably possible to corral it from any use that the ISP doesn't like, but is not under the subscribers control.